Register. Java // used to generate a JavaBean
Package info. haowei. JavaBean; 2 3 Import java. util. hashmap; 4 Import java. util. Map; 5 6 Public class register { 7 8 Private string name; 9 Private string age; 10 Private string email; 11 Private Map <string, string> errors = Null ; 12 13 14 15 Public Register (){ 16 This . Name = "" ; 17 This . Age = ""; 18 This . Email = "" ; 19 This . Errors = New Hashmap <string, string> (); 20 } 21 Public String getname (){ 22 Return Name; 23 } 24 Public Void Setname (string name ){ 25 This . Name = Name; 26 } 27 Public String getage (){ 28 Return Age; 29 } 30 Public Void Setage (string age ){ 31 This . Age = Age; 32 } 33 Public String getemail (){ 34 Return Email; 35 } 36 PublicVoid Setemail (string email ){ 37 This . Email = Email; 38 } 39 40 Public Boolean Isvalidate (){ 41 Boolean Flag = True ; 42 If (! This . Name. Matches ("\ W {6, 15 }" )){ 43 Flag = False ; 44 This . Name = "" ; 45 This . Errors. Put ("errorname", "username is a 6-15 digit number" ); 46 } 47 If (! This . Email. Matches ("\ W + @ \ W + \. \ W + \\.? \ W *" )){ 48 Flag = False ; 49 This . Email = "" ; 50 This . Errors. Put ("erroremail", "invalid email address" ); 51 } 52 If (! This . Age. Matches ("\ D +" )){ 53 Flag = False ; 54 This . Age = "" ; 55 This . Errors. Put ("errorage", "Age input is invalid" ); 56 } 57 58 Return Flag; 59 } 60 61 Public String geterrormsg (string key ){ 62 String value = This . Errors. Get (key ); 63 If (Value = Null ){ 64 Return "" ; 65 } 66 Return Value; 67 } 68 69 70 71 }
// Check. jsp is used to determine whether the input is correct
<% @ Page contenttype = "text/html" pageencoding = "GBK" %> <HTML> //Solve the garbled problem %><JSP: usebean id = "Reg" Scope = "request" class = "info. haowei. javaBean. register "/> <JSP: setproperty property =" * "name =" Reg "/> <body> <%If(Reg. isvalidate ()){%> <JSP: Forward page = "success. jsp"> </jsp: Forward> <%}Else{%> <JSP: Forward page = "index. jsp"> </jsp: Forward ><%}%> </body>
// Index. jsp uses form input and transmits information through JavaBean
1 <% @ Page contenttype = "text/html" pageencoding = "GBK" %> 2 <HTML> 3 <Head> 4 </Head> 5 <% Request. setcharacterencoding ("GBK "); // Solve the garbled problem %> 6 <JSP: usebean id = "Reg" Scope = "request" class = "info. haowei. JavaBean. Register"/> 7 8 <Body> 9 <Form action = "check. jsp" method = "Post"> 10 Username: <input type = "text" name = "name" value = "<JSP: getproperty name =" Reg "property =" name "/>"/> 11 <% = Reg. geterrormsg ("errorname") %> <br> 12 Age: <input type = "text" name = "Age" value = "<JSP: getproperty name =" Reg "property =" Age "/>"/> 13 <% = Reg. geterrormsg ("errorage") %> <br> 14 Email: <input type = "text" name = "email" value = "<JSP: getproperty name =" Reg "property =" email "/>"/> 15 <% = Reg. geterrormsg ("erroremail") %> <br>16 17 <Input type = "Submit" value = "Submit"> 18 <Input type = "reset" value = "reset"> 19 </Form> 20 </Body> 21 </Html>
// Registration successful page
1 <% @ Page contenttype = "text/html" pageencoding = "GBK" %> 2 <HTML> 3 <Head> 4 </Head>5 <% Request. setcharacterencoding ("GBK "); // Solve the garbled problem %> 6 <JSP: usebean id = "Reg" Scope = "request" class = "info. haowei. JavaBean. Register"/> 7 8 <Body> 9 10 Username: <JSP: getproperty name = "Reg" property = "name"/> <br> 11 12 Age: <JSP: getproperty name = "Reg" property = "Age"/> <br> 13 14 Email: <JSP: getproperty name = "Reg" property = "email"/> <br> 15 16 17 18 </Body> 19 </Html>
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